Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Coil Cable Integrated Hinge Mechanism

IP.com Disclosure Number: IPCOM000245876D
Original Publication Date: 2016-Apr-14
Included in the Prior Art Database: 2016-Apr-14
Document File: 2 page(s) / 255K

Publishing Venue

Motorola

Related People

Garcia, Jorge: INVENTOR [+2]

Abstract

Many hinged mechanical systems require electrical connections across a hinged section. These electrical connections must be maintained for the life of the product across multiple open and close cycles. This requires geometries that minimize stresses of the conductors across the angle working range of the hinge so as to prevent fatigue failures and broken connections. Traditional methods using flexes that twist within the axis of rotation (as used in flip phones and laptops) can be fragile and expensive and are difficult to seal against environments. In addition, future use of fiber optics as a connection means is not possible with a traditional flex configuration. The proposed invention offers a novel and inexpensive approach using a traditional coil cord.

This text was extracted from a Microsoft Word document.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Coil Cable Integrated Hinge Mechanism

By Jorge Garcia, Chi Tran

Motorola Solutions

 

ABSTRACT

Many hinged mechanical systems require electrical connections across a hinged section.  These electrical connections must be maintained for the life of the product across multiple open and close cycles.  This requires geometries that minimize stresses of the conductors across the angle working range of the hinge so as to prevent fatigue failures and broken connections.  Traditional methods using flexes that twist within the axis of rotation (as used in flip phones and laptops) can be fragile and expensive and are difficult to seal against environments.  In addition, future use of fiber optics as a connection means is not possible with a traditional flex configuration.  The proposed invention offers a novel and inexpensive approach using a traditional coil cord.

PROBLEM

Most hinged electrical devices (flip phones / laptops) use flexes that are run axially along the pivot axis.  This allows the flex to twist rather than bend so as to minimize stresses during cycling of the hinge.   This methods can be fragile, expensive (requiring expense of flex and additional connectors), and can be difficult to seal against water intrusion.  Cabled connections (such as used in car doors) require substantial room for running cable on axis with the hinge (twist and minimize cable bending.)  This method is not preferable in a small portable device as the cable can catch on things because of its exposure.

.

SOLUTION

The invention uses a traditional coil cord (as is often used in remote speaker microphone accessories for two way radios or related family of products) and wraps the cord around the axis of pivot.   This allows the cord to be minimally stressed during opening and closing of the hinge.  The coil does not exten...